On integrating acoustic echo and noise cancellation systems for hands-free telephony
On integrating acoustic echo and noise cancellation systems for hands-free telephony
复制标题
集成免提电话声学回声和噪声消除系统
DOI：
10.1109/icassp.2001.941076
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
D. Youn
中科院分区：
文献类型：
--
作者：
S. Park;Chum Gun Cho;Chungyong Lee;D. Youn
提出了一种用于免提电话的综合声回波和噪声消除系统。该系统包括一种新的基于频谱分析的残余回波消除方案和一种新的适合实时实现的双导检测器。残馀回波在无近通话结束时段通过AR分析白化，并通过降噪消除。除残馀回波信号的语音特征外，降噪成功地降低了残馀回波的功率和环境噪声。为了与商用低比特率语音编码器进一步集成，考虑了IS-127 （EVRC）的降噪。对于移动中的免提情况，该系统在90 km/h的恒定速度下对干扰的衰减大于30 dB。该系统是在低成本的16位定点算法DSP上实现的。
An integrated acoustic echo and noise cancellation system for hands-free telephony is presented. The proposed system includes a new residual echo cancellation scheme based on spectral analysis and a new double-talk detector suitable for real-time implementation. Residual echo is whitened via AR analysis during no near-end-talk period and is cancelled by noise reduction. Removing speech characteristics of the residual echo signal, noise reduction successfully reduces the power of the residual echo as well as the ambient noise. For further integration with commercial low-bit rate speech coders, noise reduction in IS-127 (EVRC) was considered. For the hands-free situation in the moving car, the proposed system attenuated the interferences more than 30 dB at a constant speed of 90 km/h. The proposed system was implemented on a low-cost DSP with 16-bit fixed-point arithmetic.